Calibrated adjusting device



July 26, 1932. A. s. HOWELL CALIBRATED ADJUSTING DEVICE Original Filed April 4, 1929 2 Sheets-Sheet 1 y 1932- A. s. HOW-ELL k 1,868,502

CALIBRATED ADJUSTING DEVICE Original Filed April 4, 1929 2 sheets-Sheet 2 Patentecl July 26, 1932 UNITED S ATES PATENT OFFICE ALBERT S. HOWELL, OF CHICAGO, ILLINOIS, ASSIGNOB TO THE BELL & HOWELL COI- PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS caun'nnrnn anau'srme nnvrcn Original application filed April 4, 1929, Serial 1T0. 352,390. Divided and this application filed April 6,

1931. Serial My invention relates particularly to calibrated adjusting devices for the variable speed governors of spring driven motion picture cameras although not limited to this use alone.

The main feature of my invention relates to a calibrated adjusting device which, while it embodies a standardized index scale, permits of marking the scale individually with reference to the particular device, say a variable speed governor, with which the adjusting device is used, so that the calibrated adjustments are accurate and individual to the particular device controlled by the adjusting device.

The above feature and certain other features hereinafter appearing are embodied in the preferred form of my invention, hereinafter fully described and illustrated in the accompanying drawings, and are effected by certain novel constructions, combinations and arrangements of parts particularly pointed out in the appended claims.

In the said drawings- Figure 1 is a side elevation of a certain well known type of spring driven motion picture camera embodying my invention, with a portion broken away:

Figure 2 is an enlarged partial opposite side elevation of the same; and

Figure 3 is a partial section on the line 3-3 of Figure 2.

Like characters of reference indicate like parts in the several views.

Referring to the drawings, 1 designates .a casing. one side of which is formed by a removable cover 2. See Figures 1 and 2. Secured within the casing is a mechanism. frame including an outer frame plate 3, and carried by this frame is spur driving gearing 6. See Figure 1.

Carried by the mechanism'frame is a revoluble shaft 9 which carries the rotating portion of a variable speed governor which is inclusive of a nonrotating member 15 slidably longitudinally of the shaft 9 for varying the speed of the governor, the member 15 being provided with a rib 16 slidably engaged in a slot 17 formed in the outer frame plate 3 and extending in parallelism with the shaft 9. The shaft 9 is driven from the gearing 6 by means of a spiral gear 25 formed on the shaft 9 and meshing with a relatively large gear 26 driven from the gearing 6, so that the speed of the gearing 6 and mechanism operated thereby is controlled by thespeed overnor, the controlled speed of the governor eing adjustableby adjustment of the member 15 longitudinally of the shaft 9, all asv fully described and claimed in my U. S. application for Letters'Patent, Serial No. 352, 90, filed April 4, 1929, for improvement in centrifugal speed governor, of which this application is a division.

Control of the governor to 'var the controlled speed thereof'is accomplis ed in the following manner.

A portion of the wall of the casing 1 extends above and is disposed in adjjacent parallelism with the outer frame p ate 3, and this portion of the'casing wall is provided with a bore therethrough in which is en ed for angular movement a manually opera le concentrically bored adjusting member 31 having an inwardly axial engagement with the casing wall, as designated at 32, to limit inward axial movement of the adjusting member with respect to the casing. See Figure 3,

A- headed member 33 is engaged for relative angular movement in the bore of the member 31 and has the head'34 thereof disposed exteriorly and inwardly engaged 1n an enlarged outer end of this bore to limit outward axial movement of the member 31 with res set to the member 33.

The s ank of the member 33extends 1nwardly beyond the member 31 and the aforementioned portion of thewall ofthe casing 1. See Figures 1 and 3. A securing arm 35 has one end thereof secured against the inner face of the said portion of the wall of the casing 1 by means of a headed screw 36', and the other end of this arm is bifurcated, as designated at 37, and is engaged in diametrically opposite chordal slots formed in the shank of the member 33 adjacent the inner end thereof.

Thus the member 33 is secured with the casing 1 against axial and angular movemeat while the adjusting member 31 is an gularly movable with respect thereto and is conveniently manually adjustable in its angula-r movement by reason of its projection extcriorly oi the casing'l, I

1 A connecting link 38 the enter face of the outer frame plate 3 one end. thereor pivotally connected with the rib 16 of the friction member 15 by of a headed screw steel 39 and has its other end pivotally connected to the inner end of the adjusting member by means of a second headed screw stud dl. disposed adjacent the periph cry of the member 31, See Figure l Thus, angular adjustment of the adj usting member 31 efiects corresponding adjustment of the friction member 15 and the control member 19 to adjust the controlled speed of the governor. y

In order that the controlled speed of the governor may be predeterminately adjpsted an indicating means is rovided whic will now be described, See igures 2 and 3.

The outer end of the ad usting member 31 is rovided with diametrlcally opposite perip erally disposed index marks 42, and a cooperating v circular scale member 43 is detachably secured on the outer face of the head 34 of the member 33 by means of a pair of beaded screws 4; whereby the scale member is replaceable in a. predetermined position thereon.

The scale member 43 is provided with.

standard indicated spaces 45 cooperating with respective of the index marks 42 to indicate ranges of adjustment of the adjusting member 31 embracing corres justments of the adjusting mem er, characters 46 at said spaces identifying said ad ust- P ments with corresponding spaces. See igure 2.

In order that the spaces 45 may be of adequate length the scale is formed of two diametrically opposite sections 47, each cooperating with a respective index mark 42,

the spaces, consecutive 'with respect to adjustment of the governor, being disposed alternately in the two sections, whereby, in' cooperation with the respective index marks,

they indicate relatively large overlapping ranges of adjustment without rendering the scale involved or confusing,

As so comprised the said scale member 43 is standard and is predeterminately mounted for replacement, litter assembly the scale is calibrated accordance with actual test, and marks 48 are placed within correspond ing of said ranges thereoi independently by individual test on the scale for cooperation with the respective index mark 42 to indicate predeterminately the corresponding adjustment oi the governor as identified by the corresponding spaces 45 and characters as Thus a standard scale is utilized which provides tor close calibration, corresponding onding ada es-asses with the particular cam in a convenient manner. In the event an :litierent cal1= bratlon is required, where the character istics of the mechanistic are changed say,

through long use, overlies cg or replacement oi parts, the calibrated scale is replaced by a new nncahbrated scale, which is then call brated by actual test While l have described shown the preferred embodiment cl my invention 1 do not wish to be limited to the precise details of construction as changes may readily be made without departing from the spirit of my invention, but having thusdescribed my invention,'li claim as new and desire to secure by Letters Patent the following;

I claim:

l "in a device of the character described the combinationof a movable adjusting member, and indicating means for predeterminately positionin said adjusting member compris- 1ng an in ex mark and a cooperatin scale relatively movable with respect to sai mark redetermin'ately with movement of said adusting member, said scale comprising indicated spaces cooperatin with said index mark to indicate ranges o adjustment of said adjusting member embracing corres ndin adjustments of said adjusting mem r an adapted to have designations ocated within corresponding of said ranges thereof independently by individual test with respect thereto to cooperatewith said index mar to indicate predetermin ately said corresponding adjustments of said adjusting member.

2. In a device of the character described the combination of a movable adjusting member,

and indicating means for predeterminately sitioning said adjusting member comprismg an index mark and a cooperating predeterminately replaceable scale relatively movable with respect to said mark predetermi nately with movement of said adjusting memher, said scale comprising standard spaces cooperating with said index mark to in icate ranges of adjustment of said ad'usting member embracing correspondin a justments of said adjusting member and c aracters identifying' said a justments with corresponding spaces and adapted to have marks placed independently thereon and within corresponding of said ranges thereof by individual test to cooperate with said index mark toindicate predeterminately said corresponding identified adjustments of said adjusting member.

3. In a device of the character described the combination of a movable adjusting member, and indicating means 't'ior predeterminately positioning said adjusting member comprising two spaced index marks and a cooperating scale relatively movable with respect to said-marks predeterminately with movement of said adjusting member, said scale comprising two sections of indicated spaces coopersting with respective of said index marks to 5 the combination with an enclosure part proindicate consecutive ranges of adjustment of said adjusting member embracing corresponding adjustments of said adjusting member and said spaces, consecutive with respect to adjustment of said adjusting member, being disposed alternately in said two sections, said scale being adapted to have designations located Within corresponding of said ranges thereof independently by individual test with respect thereto to cooperate with respective of said index marks to indicate predeterminately said corresponding adjustments of said adjusting member.

4. In a device of the character described the combination of a movable adjusting member, and indicating means for predeterminately positioning said adjusting member comprising two spaced index marks and a cooperating scale relatively movable with respect to said marks predeterminately with movement of said adjusting member, said scale comprising two sections of spaces coo erating with respective of said index marlzs to indicate consecutive overlapping ranges of adjustment of said adjusting member, embracing corres onding adjustments, of said adjusting mem er and said spaces, consecutive with respect to adjustment of said adjusting member, being disposed alternately in said two sections and characters identifying said adjustments with corresponding spaces,

said scale being adapted to have marks placed independently at said spaces by individual test to indicate predeterminately said corresponding identified adjustments of said adjusting member.

5. In a device of the character described the. combination with an enclosure part provided with a bore therethrough, of a manually operable concentrically bored adjusting member engaged for angular movement in said ing index mark and scale means associated with'the head of said headed member and the outer end of said adjusting member for predeterminately positioning said adjusting member. Y

6. In a device of the character described gaging in an enlarged outer end of this bore,

means on the inside of said casing part securing said headed member stationary therewith,

and a circular scale member detachably secured on the outer face of said head and co- 

